posted by tyson .
In a certain city the temperature (in degrees Fahrenheit) t hours after 9am was approximated by the function: T(t)= 70 + 19sin((pi*t)/12). What is the temperature at 3 pm?
at 3pm, t=6, so
T(6)= 70 + 19sin((pi*6)/12) = 70+19 = 89